摘要
把原材料(不管是复合陶瓷还是超硬材料)粉碎到粒径为100μm以下,再进行颗粒分级使微粉尺寸趋于均匀,一般采用沉降法或溢流法进行分级。其技术关键在于有一个可靠的理论计算公式。作者根据颗粒动力学原理导出一个理论计算公式。该公式适合各种粒径的多角颗粒的运动规律,其应用范围比Stokes公式广泛得多,后者仅适用于微球。
It is always necessary to reduce the particle sizes in raw materials (whether ceramic composites or superhard materials)to 100μm and to separate the microparticles in order to make the sizes uniform, Generally, microparticles are classified by sedimentation or overflow. The key to the technolog is to use a reliable formula for calculation. According to the principles of particle dynamics, a theoretical formula is developed in this paper. This new formula is suitable for use over a wider range than Stokes' law can be applied to because it conforms to the Jaw of motion of multisized angular particles, whereas Stokes' law can be applied only to small spherical particles.
关键词
硬材微粉
颗粒分级
沉降速度
Microparticle
Size separation
Settling velocity.
